Construction ventilation method for large and long tunnel

Abstract

The invention discloses a construction ventilation method for a large and long tunnel. Before the car crossing between the left hole and the right hole of the tunnel is penetrated, the tunnel adopts apress-in ventilation method and the entrances and exits of the left and right holes are externally provided with local ventilators, and the local ventilators can supply air to each face of the tunnelrespectively; meanwhile, in order to ensure the flow stability of the airflow in the tunnel after the crosswalk of the tunnel is penetrated, a jet fan is installed at intervals of the left or right hole of the tunnel to guide the airflow direction and blow off the accumulated gas in a local section. The method provided by the invention fully utilizes the left and right holes and the intermediatecar crossing of the parallel construction, reduces the convection and vortex of the air in the hole by adopting the method of single hole intake and single hole exhaust, improves the ventilation efficiency, and ensures the life health safety of construction worker maximally.

Description

technical field [0001] The invention relates to a construction ventilation method for a large and long tunnel, belonging to the technical field of tunnel ventilation. Background technique [0002] Ventilation methods for tunnel construction are generally push-in type, extraction type, hybrid type and roadway type. The above-mentioned traditional ventilation methods have the following defects: the press-in ventilation requires a huge amount of air during long-distance construction, and the return air will pollute the entire roadway; The fresh air flows through the whole hole and is not very fresh when it reaches the working face; the construction management of hybrid and roadway ventilation is complicated. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a construction ventilation method for large and long tunnels with simple structure, convenient construction and good ventilation effect, so as to overcome the d...

AI Technical Summary

Problems solved by technology

The above-mentioned traditional ventilation methods have the following defects: the press-in ventilation requires a huge amount of air during long-distance construction, and the return air will pollute the entire roadway; The fresh air flows through the whole hole and is not very fresh when it reaches the working surface; the construction management of hybrid and roadway ventilation is complicated

Images